My dad just bought a '91 MR2 Turbo. I plan on buying it off of him soon and have started making my list of things needing to be upgraded/improved. I noticed that every speaker in the car is either not working, or is ripped and sounds horrible if turned up past a wisper. I was wondering if anybody has any suggestions as to what to upgrade to. I would like to keep the space for the t-tops behind the seat, and maybe replace the sub under the drivers seat. Also, I will need to replace the entire head unit. Any suggestions would be great!